#include <stdio.h>

 int main()
 {
    int age(int n);
    int n;
    printf("NO.5,age:%d\n",age(5));
    return 0;

    

 }

 int age(int n)
 {
    int c;
    if(n==1)
    c=10;
    else 
    c=age(n-1)+2;

    return c;

 }